Texas Wastewater Class B Practice Exam

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Prepare for the Texas Wastewater Class B Exam with our comprehensive quiz featuring multiple-choice questions designed to cover essential topics, complete with hints and explanations for each question. Excel in your certification journey!

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What is the role of the aeration tanks in the Activated Sludge Process?

To store excess sludge
To supply oxygen to microorganisms
To remove solid waste
To cool down wastewater

The correct answer is: To supply oxygen to microorganisms

The aeration tanks play a crucial role in the Activated Sludge Process primarily by supplying oxygen to the microorganisms that are essential for the treatment of wastewater. During this process, air or oxygen is introduced into the tanks to facilitate the growth and activity of aerobic bacteria, which break down organic matter present in the wastewater. These microorganisms utilize the oxygen to metabolize and decompose the organic contaminants, converting them into biomass and other byproducts. This step is vital for reducing the biochemical oxygen demand (BOD) of the wastewater, thereby improving its quality before it is discharged or subjected to further treatment. Other roles mentioned, such as storing excess sludge or removing solid waste, do not accurately reflect the primary function of the aeration tanks but rather pertain to other components of the wastewater treatment process. While cooling down wastewater is a process that can occur, it is not a function of the aeration tanks and does not contribute to their primary purpose in the treatment process.